I couldn't give a shite if any of them are doping to be honest

if they have been then great, it made the tennis even better! Makes no odds to me if none, one, two or all three of them are. The fitness thing about Djokovic could easily be said about Federer in 2017 as well, the bloke barely broke a sweat all year at 35 year old after being a crock! If it comes out that one of them has been at it then it wouldn't really change my view on any of them. They're all phenomenal and we're very lucky to get an era with all three of them, Murray, del Potro, Wawrinka, Ferrer, Cilic, Nishikori, Berdych, Tsonga etc at the same time.
If any of them latter names were coming through right now they'd probably be the second best player in the world at the minute to be honest.